Bicycle frame



FIG. 1 is a side perspective view of my new design for a bicycle frame;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front perspective view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is an opposite side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a front elevational view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a top plan view thereof;

FIG. 10 is a side perspective view of a second embodiment of my newdesign for a bicycle frame;

FIG. 11 is a rear perspective view of FIG. 10;

FIG. 12 is a front perspective view of FIG. 10;

FIG. 13 is a side elevational view of FIG. 10 thereof; and,

FIG. 14 is an opposite side elevational view of FIG. 10.

The ornamental design for a bicycle frame, as shown and described.